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RFI analysis applied to the TDRSS systemThe effect of radio frequency interference (RFI) on the proposed Tracking and Data Relay Satellite System (TDRSS) was assessed. The method of assessing RFI was to create a discrete emitter listing containing all the required parameters of transmitters in the applicable VHF and UHF frequency bands. The transmitter and spacecraft receiver characteristics were used to calculate the RFI contribution due to each emitter. The individual contributions were summed to obtain the total impact in the operational bandwidth. Using an as yet incomplete emitter base, it is concluded that the 136- to 137-MHz band should be used by TDRSS rather than the whole 136- to 138-MHz band because of the higher interference levels in the 137- to 138 MHz band. Even when restricting the link to 136 to 137 MHz, the existing link design is marginal, and it is recommended that interference reduction units, such as the adaptive digital filter, be incorporated in the TDRSS ground station.
Document ID
19740041068
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Jenny, J. A.
(ESL, Inc. Sunnyvale, Calif., United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1973
Subject Category
Communications
Meeting Information
Meeting: International Telemetering Conference
Location: Washington, DC
Start Date: October 9, 1973
End Date: October 11, 1973
Accession Number
74A23818
Funding Number(s)
CONTRACT_GRANT: NAS5-20406
Distribution Limits
Public
Copyright
Other

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